Russia is too allied with the sons of Ismael to ever consider such a proposition.
Over half of their allies are Muslim.
Over 25% of Moscow’s population is Muslim.
Putin has his own demographic problems.
He might even convert in a few years.
They're mostly illegal immigrants from Central Asia. The Russians won't have a problem with kicking them out and putting them in gulags anytime they feel like.
In the meantime, they need the cheap labor.